Electronic device and method of driving the same

Abstract

An electronic device includes: a display layer displaying an image; a driving controller receiving an input image signal and a control signal and outputting a horizontal synchronization signal and image data; a data driving circuit configured to provide a data signal to the display layer in response to the horizontal synchronization signal and the image data; a sensor layer on the display layer; and a sensor driver driving the sensor layer and receiving sensing signals, wherein the sensor driver is configured to: output a horizontal synchronization control signal of a first level during a touch sensing mode of detecting a touch input; and output the horizontal synchronization control signal of a second level different from the first level during a pen sensing mode of detecting a pen input, and the driving controller changes a horizontal period of the horizontal synchronization signal in response to the horizontal synchronization control signal.

What is claimed is: 
     
         1 . An electronic device comprising:
 a display layer configured to display an image;   a driving controller configured to receive an input image signal and a control signal and to output a horizontal synchronization signal and image data;   a data driving circuit configured to provide a data signal to the display layer in response to the horizontal synchronization signal and the image data;   a sensor layer on the display layer; and   a sensor driver configured to drive the sensor layer and to receive sensing signals from the sensor layer,   wherein the sensor driver is configured to:   output a horizontal synchronization control signal of a first level during a touch sensing mode of detecting a touch input; and   output the horizontal synchronization control signal of a second level different from the first level during a pen sensing mode of detecting a pen input, and   wherein the driving controller is configured to change a horizontal period of the horizontal synchronization signal in response to the horizontal synchronization control signal.   
     
     
         2 . The electronic device of  claim 1 , wherein the driving controller is configured to:
 output the horizontal synchronization signal including a first horizontal period based on the horizontal synchronization control signal being at the first level; and   output the horizontal synchronization signal including a second horizontal period different from the first horizontal period based on the horizontal synchronization control signal being at the second level.   
     
     
         3 . The electronic device of  claim 2 , wherein the second horizontal period of the horizontal synchronization signal is set such that a frequency of noise included in the sensing signals does not overlap a frequency of a downlink signal from an input device. 
     
     
         4 . The electronic device of  claim 2 , wherein the horizontal synchronization signal includes a plurality of pulses, and
 wherein each of the plurality of pulses includes the second horizontal period during the pen sensing mode.   
     
     
         5 . The electronic device of  claim 2 , wherein the horizontal synchronization signal includes a plurality of pulses, and
 wherein a time of the second horizontal period of each of the plurality of pulses is differently set during the pen sensing mode.   
     
     
         6 . The electronic device of  claim 1 , wherein the driving controller is configured to:
 output the horizontal synchronization signal including a first back porch period based on the horizontal synchronization control signal being at the first level; and   output the horizontal synchronization signal including a second back porch period different from the first back porch period based on the horizontal synchronization control signal being at the second level.   
     
     
         7 . The electronic device of  claim 1 , wherein the driving controller is configured to:
 output the horizontal synchronization signal including a first horizontal blank period based on the horizontal synchronization control signal being at the first level; and   output the horizontal synchronization signal including a second horizontal blank period different from the first horizontal blank period based on the horizontal synchronization control signal being at the second level.   
     
     
         8 . The electronic device of  claim 1 , wherein the sensor driver is configured to:
 determine a frequency of noise based on the sensing signals based on an approach of an input device being detected in the touch sensing mode; and   output the horizontal synchronization control signal of the second level based on the frequency of the noise overlapping a downlink frequency of the input device.   
     
     
         9 . The electronic device of  claim 1 , wherein the sensor driver is configured to:
 determine an amplitude of noise based on the sensing signals based on an approach of an input device being detected in the touch sensing mode; and   output the horizontal synchronization control signal of the second level based on the amplitude of the noise being greater than a reference value.   
     
     
         10 . The electronic device of  claim 1 , wherein the driving controller is configured to output a noise pattern signal of an active level based on a pattern of the input image signal being a noise pattern. 
     
     
         11 . The electronic device of  claim 10 , wherein the sensor driver is configured to output the horizontal synchronization control signal of the second level based on an approach of an input device being detected in the touch sensing mode and the noise pattern signal being at the active level. 
     
     
         12 . A method of driving an electronic device, the method comprising:
 operating in a touch sensing mode of detecting a touch input;   outputting a horizontal synchronization control signal of a first level;   outputting a horizontal synchronization signal of a first horizontal period in response to the horizontal synchronization control signal of the first level;   determining whether an input device is approaching;   outputting the horizontal synchronization control signal of a second level different from the first level based on an approach of the input device being detected; and   outputting the horizontal synchronization signal of a second horizontal period in response to the horizontal synchronization control signal of the second level.   
     
     
         13 . The method of  claim 12 , further comprising:
 displaying an image on a display layer in response to the horizontal synchronization signal; and   receiving sensing signals from a sensor layer on the display layer.   
     
     
         14 . The method of  claim 13 , wherein the second horizontal period of the horizontal synchronization signal is set such that a frequency of noise included in the sensing signals does not overlap a frequency of a downlink signal from the input device. 
     
     
         15 . The method of  claim 13 , wherein the outputting of the horizontal synchronization control signal of the second level different from the first level based on the approach of the input device being detected includes:
 determining a frequency of noise based on the sensing signals; and   outputting the horizontal synchronization control signal of the second level based on the frequency of the noise overlapping a downlink frequency of the input device.   
     
     
         16 . The method of  claim 13 , wherein the outputting of the horizontal synchronization control signal of the second level different from the first level based on the approach of the input device being detected includes:
 determining an amplitude of noise based on the sensing signals; and   outputting the horizontal synchronization control signal of the second level based on the amplitude of the noise being greater than a reference value.   
     
     
         17 . The method of  claim 12 , wherein the horizontal synchronization signal includes a first back porch period based on the horizontal synchronization control signal being at the first level, and
 wherein the horizontal synchronization signal includes a second back porch period different from the first back porch period based on the horizontal synchronization control signal being at the second level.   
     
     
         18 . The method of  claim 12 , wherein the horizontal synchronization signal includes a first horizontal blank period based on the horizontal synchronization control signal being at the first level, and
 wherein the horizontal synchronization signal includes a second horizontal blank period different from the first horizontal blank period based on the horizontal synchronization control signal being at the second level.   
     
     
         19 . The method of  claim 12 , wherein the horizontal synchronization signal includes a plurality of pulses, and
 wherein a time of the second horizontal period of each of the plurality of pulses of the horizontal synchronization signal is differently set based on the approach of the input device being detected.   
     
     
         20 . The method of  claim 12 , further comprising:
 determining whether a pattern of an input image signal is a noise pattern,   wherein the outputting of the horizontal synchronization control signal of the second level different from the first level based on the approach of the input device being detected includes outputting the horizontal synchronization control signal of the second level based on the pattern of the input image signal being the noise pattern.